Phys PCT 2 Revision ( P1)

Question 1

what’s the formula to calculate speed

Answer 1

Speed (m/s) = Distance (m) / Time (s)

Question 2

formula calculating Velocity

Answer 2

Velocity (specific direction )= Distance (m) / Time (s)

Question 3

what’s acceleration

Answer 3

When an object speeds up, we say it is accelerating. When it is slowing down, we say it is decelerating. The faster the speed changes, the faster the acceleration.

Question 4

What’s the formula calculating Acceleration

Answer 4

acceleration = Change in Velocity ( m/s^2) / Time Taken ( s)

Eg: A snowball rolls down a slope. It speeds up from 2 m/s to 14 m/s in 2 seconds. Calculate the acceleration of the snowball.

14-2 = 12
12/2 =6 m/s ^2

Question 5

Formula for Mass and weight ?

Answer 5

weight (N) = mass (kg) × gravitational field strength (N/kg)

W = mg 

Eg, When Neil Armstrong wore his spacesuit, his mass was 160 kg. What was his weight on Earth?

On Earth, g = 10 N/kg

W = mg

So: W = 160 × 10 = 1600 N

Question 6

What’s the to calculate formula Density

Density - Density is the mass per unit volume.

Answer 6

density (kg/m 3 ) = Mass ( Kg) / Volume ( m^3)